refactor: Move Astro to root, use PORT env (default 80), allow all hosts

- Move Astro files from dealplustech-astro/ to project root
- Update Dockerfile: PORT environment variable (default 80)
- Add vite.config.ts with allowedHosts: true
- Matches nixpacks behavior for Easypanel deployment
- No hardcoded ports or domains

node_modules/package-manager-detector/dist/index.d.mts

@@ -0,0 +1,4 @@
+export { COMMANDS, constructCommand, resolveCommand } from './commands.mjs';
+export { AGENTS, INSTALL_METADATA, INSTALL_PAGE, LOCKS } from './constants.mjs';
+export { detect, getUserAgent } from './detect.mjs';
+export { A as Agent, b as AgentCommandValue, c as AgentCommands, a as AgentName, C as Command, d as DetectOptions, e as DetectResult, D as DetectStrategy, R as ResolvedCommand } from './shared/package-manager-detector.DksAilYA.mjs';